EP0092864A2 - Wärmepumpensystem für Heisswasserbereitung - Google Patents

Wärmepumpensystem für Heisswasserbereitung Download PDF

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Publication number
EP0092864A2
EP0092864A2 EP83200524A EP83200524A EP0092864A2 EP 0092864 A2 EP0092864 A2 EP 0092864A2 EP 83200524 A EP83200524 A EP 83200524A EP 83200524 A EP83200524 A EP 83200524A EP 0092864 A2 EP0092864 A2 EP 0092864A2
Authority
EP
European Patent Office
Prior art keywords
water
valve
container
pump
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP83200524A
Other languages
English (en)
French (fr)
Other versions
EP0092864A3 (de
Inventor
Franco Moretti
Albertus Peter Johannes Michels
Reinhard Kersten
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IRE Industrie Riunite Eurodomestici SpA
Koninklijke Philips NV
Original Assignee
IRE Industrie Riunite Eurodomestici SpA
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from IT20745/82A external-priority patent/IT1201943B/it
Priority claimed from IT24914/82A external-priority patent/IT1153691B/it
Application filed by IRE Industrie Riunite Eurodomestici SpA, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical IRE Industrie Riunite Eurodomestici SpA
Publication of EP0092864A2 publication Critical patent/EP0092864A2/de
Publication of EP0092864A3 publication Critical patent/EP0092864A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F24D19/1054—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/223—Temperature of the water in the water storage tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/335—Control of pumps, e.g. on-off control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • F24H15/38—Control of compressors of heat pumps

Definitions

  • This invention relates to a hot water production system, particularly for domestic use, comprising: a water container, possibly with an electric heating element, and provided with a cold water inlet and a hot water outlet; a water circuit connected to the container and comprising a heat exchanger and a circulation pump; the system further comprising a heat pump, the condenser of which forms part of the heat exchanger.
  • the insulated container is a normal electrical hot water production appliance, known as a water heater, and provided with a bottom cold water inlet and a top hot water outlet
  • a water heater normally electrical hot water production appliance
  • the water from the electric water heater mixes with the insufficiently heated water from the heat pump, so that the user item receives a mixture at a temperature lower than the presumed temperature, i.e. lower than that indicated for example on the thermometer of the electric water heater.
  • This drawback could be overcome by using heat pumps of greater power, but this would obviously result in greater overall size cost of purchase.
  • the object of the present invention is therefore to provide a system of the specified type which obviates the aforesaid drawback by using a heat pump which is not over-sized, together with an electric water heater of conventinal type, which may already be installed in the user's premises, and without having to make actual modifications to the water heater.
  • the water circuit comprises, an automatically operated valve which is controlled by a sensor which senses the temperature in the circuit.
  • the automatically controlled valve is a two position valve which in neither of its two positions does prevent passage of water from the pump to the container.
  • valves having no shut-off position consists of using a valve having no shut-off position.
  • the valve could have a maximum opening position and a minimum opening position, or alternatively be provided with a passage in its valve element.
  • a further simple method consists of using a valve having a total closure position and a total opening position, and being associated with a conduit or channel of small cross-section disposed in parallel to that controlled by the valve itself.
  • a further advantageous embodiment of the system according to the invention is characterized in that the water circuit comprises in parallel with the container and heat-exchanger a return line controlled by the valve.
  • the valve used is of the modulating type, in the sense that the diversion of water towards the return line depends on the temperature of the water fed by the circulation pump.
  • the water is kept circulating by the circulation pump through the heat exchanger, which can also act as an accumulator, so that the water heats up in less time, and the temperature-controlled valve returns a fraction (depending on the temperature) of the pump throughput to the heat exchanger, the remaining fraction of the throughput passing to the user item or to the container.
  • reference numeral 1 indicates a container covered with an insulating layer 2 to prevent heat-loss from the contained water towards the outside.
  • the container can be any known hot water cylinder provided internally with an electric heater element associated with a thermal protector (not shown).
  • the container is connected hydraulically by a normal T connector 20 both to the cold water inlet 3 and to a water heating circuit indicated overall by 4.
  • the container 1 is hydraulically connected by a normal T connector 20A to said circuit 4, and to an outlet pipe 5 which feeds the hot water to the user point, for example the shower of an apartment.
  • the water circuit 4 comprises an electrically operated circulation pump 6 and a heat exchanger 7.
  • the entire circuit 4 and thus also the heat exchanger 7 are suitably heat-insulated.
  • a thermostat T which controls the electric motors of the circulation pump 6 and of the compressor 10 forming part of a heat pump 9, senses the temperature of the water in the container 1 by means of its sensor TA.
  • the heat exchanger is associated with the condenser 8 of the heat pump 9, which in the normal manner comprises the said compressor 10, the condenser 8, the expansion device 11 (for example a thermostatic valve) and the evaporator 12, which as shown can be arranged in an airflow generated by a fan 13.
  • a cooling liquid fed by a pump can be brought into contact with the evaporator 12.
  • the fan 13 can also be controlled by the thermostat T.
  • the thermostat T can also be located at a point in the water circuit 4.
  • a valve 14 is disposed in the water circuit between the circulation pump 6 and connector 20A, and can assume two positions, namely a complete shut-off, i.e. closed position, and an open position.
  • the valve can be of the thermostatic type, i.e. to open and close in accordance with the expansion and contraction of a component which "senses" the water temperature. This "sensor" is shown separately and indicated by S in Figure 1.
  • the valve can alternatively be of the electromagnetic type and open when the temperature sensed by the sensor S has caused electrical circuit of the valve to be made.
  • the cross-section of the conduit 16 is a fraction of the passage cross-section of the valve 14.
  • the valve 14 can also be constructed as shown diagrammatically in Figures 2 and 3. With these valves there is no need to provide a conduit 16 in parallel with the valve.
  • the body 20 of the valve 14A is provided with a channel 16A disposed in parallel to the passage 21 which itself can be shut off by the valve element 22, which is controlled by the inductor 23. This latter is supplied by an electrical source when the relative supply circuit is made by means of the thermal sensor S.
  • the valve element 22B of the valve 14B ( Figure 3) can be provided with a passage aperture 16B, which remains open when the valve element is in its shut-off position.
  • the container 1 and line 4 will be full of cold water at mains temperature, for example 12°C
  • the thermostat T will start the compressor 10, the circulation pump 6 and possibly the fan 13, and the valve 14 will be in its shut-off position, so that only a small fraction of the water fed by the pump 6 passes through the conduit 16.
  • the water throughput circulating through the circuit 4 is less than that which would circulate with the valve open.
  • the water circulates more slowly through the circuit 4 than when the valve is open, and thus attains a higher temperature at the upstream side of the valve 14 after a given time.
  • the valve 14 opens, and is traversed by a higher throughput of water, which is fed into the container 1.
  • This hot water is replaced by the cold water, which is withdrawn from the bottom of the container.
  • the result is that the valve 14 again closes, the water throughput reduces, the water temperature increases at S, and the valve 14 opens when the threshold value is reached at S. This cycle is repeated until all the water has attained the operating temperature of the thermostat T, which then switches off the circulation pump 6, the compressor 10 and possibly the fan 13.
  • FIG 3 shows a system of the same type as the system shown in Figure 1, and therefor in both Figures the same reference numerals denote corresponding parts.
  • the difference between the two systems is that the system according to Figure 3 comprises a return duct 16.
  • the temperature-controlled valve 14 of known type is disposed between the circulation pump 6 and the connector 20A, and divides the water throughput fed by the circulation pump 6 between the return line 16 and the pipe 17 leading to the T connector 20A, in accordance with the temperature sensed by a sensor S.
  • the sensor S can be disposed either upstream or downstream of the valve 14 and senses the water temperature.
  • the signal representing the temperature sensed by the sensor S can be amplified and used for controlling a motor, not shown, which operates the valve 14 and controls the water flow to the line 16 and pipe 17.
  • the temperature signal can control the valve by means of a linkage.
  • the valve in question directs the entire throughput of the pump 6 towards the return line 16 and through the T connector 18 of the heat exchanger 7.
  • the unidirectional valve 15 between the connectors 18 and 20 prevents circulation in the opposite direction to the arrow X. As the water temperature increases, an increasing fraction of the water is made to flow to the pipe 17 and from this to-the user item through the pipe 5, or to the container 1.
  • the container 1 and heat-exchanger 7 will be full of cold water at mains temperature, e.g. 12 o C, and the thermostat T will have cut in to operate the compressor 10, the fan 13 (if this latter is not already operating) and the circulation pump 6.
  • the valve 14 will be in a position such as to direct the entire throughput of the pump 6 towards the return line 16. Consequently, only the water circulating through the heat-exchanger 7 will be heated by the heat pump 9.
  • valve 14 When this water reaches a certain temperature (and assuming the user does not require hot water), the valve 14 enables a fraction of the pump throughput (this fraction increasing with temperature) to be fed to the container 1, and cold water from this latter enters the heat-exchanger 7 as replacement. By this means, the temperature in this latter decreases in spite of the fact that the heat pump 9 continues to provide heat.
  • FIG. 4 shows an embodiment which from the conceptual aspect is equivalent to the preceding. The only difference is that the heat- exchanger 7 is replaced by a conventional circulation-type heat-exchanger 7A.
  • the water circuit 4 and heat pump can be connected to a container 1 (normally used for heating the water by means of an electric heating element) by simple T connectors, the installation of which is easy and rapid. This represents a considerable economical and practical advantage for the installation of a heat pump on the premises of a user already provided with a conventional water heater.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
EP83200524A 1982-04-15 1983-04-13 Wärmepumpensystem für Heisswasserbereitung Withdrawn EP0092864A3 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT2074582 1982-04-15
IT20745/82A IT1201943B (it) 1982-04-15 1982-04-15 Perfezionamenti agli impianti a pompa di calore per la produzione di acqua calda
IT24914/82A IT1153691B (it) 1982-12-22 1982-12-22 Impianto perfezionato per la produzione di acqua calda con l'uso di una pompa di calore
IT2491482 1982-12-22

Publications (2)

Publication Number Publication Date
EP0092864A2 true EP0092864A2 (de) 1983-11-02
EP0092864A3 EP0092864A3 (de) 1984-01-18

Family

ID=26327644

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83200524A Withdrawn EP0092864A3 (de) 1982-04-15 1983-04-13 Wärmepumpensystem für Heisswasserbereitung

Country Status (2)

Country Link
EP (1) EP0092864A3 (de)
ES (1) ES521463A0 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990002300A1 (en) * 1988-08-22 1990-03-08 Thermia Ab Heat pump for heating or cooling confined spaces, and also for heating tap water
US7127905B2 (en) 2003-12-19 2006-10-31 Carrier Corporation Vapor compression system startup method
US7225629B2 (en) 2004-01-20 2007-06-05 Carrier Corporation Energy-efficient heat pump water heater
EP1972858A3 (de) * 2007-03-22 2009-06-03 Sanden Corporation Vorrichtung zur Abgabe von heißem Wasser
CN103245063A (zh) * 2013-05-13 2013-08-14 华伦·麦基奇尼 一种热交换系统智能化控制装置及其控制方法
JP2015232425A (ja) * 2014-06-10 2015-12-24 三菱電機株式会社 貯湯式給湯機
JP2023116913A (ja) * 2022-02-10 2023-08-23 リンナイ株式会社 給湯システム

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4141222A (en) * 1977-04-27 1979-02-27 Weatherking, Inc. Energy recovery system for refrigeration systems
FR2468074A1 (fr) * 1979-10-23 1981-04-30 Omnium Tech Etu Const Equip Installation perfectionnee a pompe a chaleur pour la production d'eau chaude
DE3169328D1 (en) * 1980-04-10 1985-04-25 Austria Email Eht Ag Control system for controlling the heating of domestic water for a storage tank

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990002300A1 (en) * 1988-08-22 1990-03-08 Thermia Ab Heat pump for heating or cooling confined spaces, and also for heating tap water
US7127905B2 (en) 2003-12-19 2006-10-31 Carrier Corporation Vapor compression system startup method
US7490481B2 (en) 2003-12-19 2009-02-17 Carrier Corporation Vapor compression system startup method
US7225629B2 (en) 2004-01-20 2007-06-05 Carrier Corporation Energy-efficient heat pump water heater
EP1972858A3 (de) * 2007-03-22 2009-06-03 Sanden Corporation Vorrichtung zur Abgabe von heißem Wasser
CN103245063A (zh) * 2013-05-13 2013-08-14 华伦·麦基奇尼 一种热交换系统智能化控制装置及其控制方法
CN103245063B (zh) * 2013-05-13 2015-05-20 华伦·麦基奇尼 一种热交换系统智能化控制装置及其控制方法
JP2015232425A (ja) * 2014-06-10 2015-12-24 三菱電機株式会社 貯湯式給湯機
JP2023116913A (ja) * 2022-02-10 2023-08-23 リンナイ株式会社 給湯システム

Also Published As

Publication number Publication date
EP0092864A3 (de) 1984-01-18
ES8404040A1 (es) 1984-04-01
ES521463A0 (es) 1984-04-01

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Inventor name: MORETTI, FRANCO

Inventor name: KERSTEN, REINHARD

Inventor name: MICHELS, ALBERTUS PETER JOHANNES